Fortress anchors are lighter and stronger than other anchors on the market because they are manufactured from a hardened high-tech, aluminum-magnesium alloy. Test data is available from both independant tests and U.S. Navy tests showing Fortress to have superior holding power in a variety of bottom conditions. Two adjustable setting angles: 32° for normal conditions or firm bottoms and 45° for soft mud. Can be fully disassembled for storage or replacement of damaged parts. Made in the USA . Lifetime parts replacement warranty. Free mud palms help anchors set in soft bottoms